Internal-combustion engine.



F.-H. KRIENITZ. INTERNAL COMBUSTION ENGINE.

I APPITIXCATION FILEDAUG-JU, 19H. v 1,281,981 Patented 1 Oct. 15, 1918";

2 SHEETS-SHEET h INVENTOR lfbsias I v BY fi ATTo R N EY INTERNAL COMBUSTION ENGINE.

APPLICATION FILED AUG. 10. 19H.

Lgmflal. Patented Oct-.15, 1918..

2 SHEETS-SHEET 2.

INVENTOR WITNESSES .ZF/J/GWJ/TEZ ATTO EY FRANK H. KRIENI'IZ, OF MCFARLAND, KANSAS.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent. Patented O t 15 1918 Application filed August 10, 1917. SerialNo. 185,553.

To all whom may concern: I

Be it known that I, FRANK H. KRIENITZ, a citizen of the United States, residing at McFarland, in the county of Vabaunsee and.

State of Kansas, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines, the broad object in view being to provide a compact and powerful lightwbight engine of simple, practical and strong construction embodying multiple cylinders and pistons, all of the pistons reciprocating as a unit, the cylinders being stationary, and the pistons beingall connected .to a single wrist pin which is in turn connected by side connecting rods to a crank shaft located at one end of the block of cylinders.

One of the chief objects of the present in vention is to provide novel valve actuating mechanism for controlling the inlet and exhaust of theeylinders, the valve mechanism being also compact, simple, reliable and readily accessible.

With the-above and other objects in .view,

the invention consists in the novel construction, combination and arrangement of parts, herein described, illustrated and claimed.

In the accompanying drawings Figure l is a horizontal section through a multiple cylinder engine embodying the present invention.

Fig. .2 is a vertical longitudinal section through the same.

Fig. 3 is an end elevation thereof.

Fig. 4 is an inside face view of one of the.

combined cylinder heads and valve chamber blocks.

Fig. 5 is a vertical cross section on the line 55 of'Fig. 2.

In the preferred embodiment of this invention I provide a plurality of cylinders 1 preferably cast in block-and arranged end to end in horizontally opposed relation. As shown in Fig. 1, there are four cylinders in the engine illustrated, the t-iy'lindei"v being arranged in horizontally opposed pairs and containing reciprocatory pistons 2. All of the piston rods 3 are connected to a common wrist pin 4. The wrist pin 4 projects on opposite sides of the block of cylinders, said block being formed in the opposite walls thereof with longitudinal slots 5 through which the wrist pin 4 works. Connecting rods 6 are attached at one end to the opposite extremities of the wrist pin 4 and are attached at their opposite extremities to a pair of crank arms 7 arranged at opposite "sides of the block of cylinders and forming parts of the crank shaft 8 which is journaled 1n bearings 9 on the adjacent cylinder head.

Multiple cylinder heads or cylinder head blocks 10 are arranged at each end :of the cylinder block and are secured in place by bolts 11 so that they may bereadily detached for cleaning purposes. Each cylinder head 10 is of proper shape and size to cover two of the cylinders l and each of said cylinder heads 10 also constitutes a valve chamber, being 'formed with the chamber 12 in which is mounted a reciprocatory piston valve 13. Each piston 13 controls an intake port li:

and an exhaust port 15. Each piston 13 is works in a cam slot 23 in a cam 24:. A cam '24 is employed for operating each piston va'lve13, the groove in the cam being designed to cause the reciprocatory piston valve to cover and uncover the intake and exhaust ports 14 and 15 at the proper moments.

The cam 24 is fast upon. a rotary cam shaft 25 journaled'in shaft hangers 26 secured to and extending downwardly from the cylinder block. The shaft 25 extends beyond one end of the cylinder bloc-k where it is supported by another hanger 27 secured to and extending downwardly from the adjacent cylinderhead 10. On the extremity of the shaft 25 is a bevel gear 28' which meshes with and is driven by another bevel gear 29 on a 'countershaft 30. The countershaft has another gear 31 which meshes with a gear.32 on the crank shaft 8. The cam shaft is thus driven by a suitable gear from and by the crank shaft, the cam shaft rotating at one-half the speed of the crank shaft in accordance with four cycle practice.

From the foregoing descri 'ition taken in connection with the accompanying drawings it will be seen that I have produced a simple, compact liglit\veiglit and reliable mul tiple cylinder internal combustion engine in which all of the pistons move as a unit and in which the cylinder heads constitute also valve chambers which are bored to admit of the reciprocatory movements of the piston valves in planes perpendicular to the axis of movement of the pistons. This admits of the arrangementof the cam shaft as shown and described, the cam shaft extending under the block of cylinders and parallel to the path ofmovement cf the pistons. The simple actuating connections between the cams on the cam shaft and the piston valves, insures an accurate timing of said valves thereby obtaining the highest power etliciency from the engine. Further more the valves may be easily removed and ground or cleaned and all of the valve actuatin'g connections are accessible; The engine may be either air cooled or water cooled as may" be preferred and any suitable lubricating system and ignition system-may be employed, it being understood that the explosions take place between the piston heads and the cylinder heads.

In an internal combustion engine, plurality of cylinders arranged end to end and formed in block, reciprocatory pistons work ing therein, a common wrist pin to which all of said pistons are connected, a crank shaft journaled in bearings at one end of the cylinder block and supported by one of the cylinder heads, connecting rods between said crank shaft and the oppositeextremr ties of said common wrist pin, combined cylinder heads and valve chambers detachably fastened to opposite ends of the cylinder block; each of said cylinder heads embodying a cylindrical bore forming'a valve chamber extending perpendicularly to the path ofv movement of the pistons, piston valves mounted to reciprocate in said valve chambers, a rotary cam shaft parallel to the path of movement of the pistons and journaled in bearingssupported by the block of cylinders, said cam shaft being geared to and driven by the crank shaft, valve operating connections between said cam shaft and said piston valves, said operating" connections embodying a cam actuated push and pull rod, a bell crank lever controlled by the last named rod, and aconnecting rod controlled by said bell crank lever and attached to the respective piston valve.

In testimony whereof I attlx my signature.

BK H. KRIENITZ. 

